package com.org.testproject;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;

import android.app.Activity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.os.Environment;
import android.widget.TextView;

public class ExternalStorageTest extends Activity{
	
	/* (non-Javadoc)
	 * @see android.app.Activity#onCreate(android.os.Bundle)
	 */
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		TextView textView = new TextView(this);
		setContentView(textView);
		
		String state = Environment.getExternalStorageState();
		
		if(!state.equals(Environment.MEDIA_MOUNTED))
		{
			textView.setText("No external storage mounted");
		}
		else
		{
			File externalDir = Environment.getExternalStorageDirectory();
			File textFile = new File(externalDir.getAbsolutePath() + File.separator + "text.txt");
			
			try
			{
				writeTextFile(textFile, "This is a test. Roger");
				String text = readTextFile(textFile);
				textView.setText(text);
				
				if(!textFile.delete())
				{
					textView.setText("Couldn't remove temporary file");
				}
			}
			catch(IOException e)
			{
				textView.setText("something went wrong! " + e.getMessage());
			}
		}
	}	
	
	private void writeTextFile(File file, String text) throws IOException 
	{
		BufferedWriter writer = new BufferedWriter(new FileWriter(file));
		writer.write(text);
		writer.close();
	}
	
	private String readTextFile(File file) throws IOException
	{
		BufferedReader reader = new BufferedReader(new FileReader(file));
		StringBuilder text = new StringBuilder();
		String line;
		
		while( (line = reader.readLine()) != null)
		{
			text.append(line);
			text.append("\n");
		}
		reader.close();
		return text.toString();
	}

}
